<template>
  <el-container class="main-container">
    <!-- 头部区域 -->
    <el-header>
      <!-- 左侧的 logo -->
      <img src="../../assets/images/logo.png" alt="" />
      <!-- 右侧的菜单 -->
      <el-menu class="el-menu-top" mode="horizontal" background-color="#23262E" text-color="#fff" active-text-color="#409EFF">
        <el-submenu index="1">
          <template slot="title">
            <!-- 头像 -->
            <img :src="userInfo.user_pic || this.defaultImg" class="avatar" />
            <span>个人中心</span>
          </template>
          <el-menu-item index="1-1"><i class="el-icon-s-operation"></i>基本资料</el-menu-item>
          <el-menu-item index="1-2"><i class="el-icon-camera"></i>更换头像</el-menu-item>
          <el-menu-item index="1-3"><i class="el-icon-key"></i>重置密码</el-menu-item>
        </el-submenu>
        <el-menu-item index="2" @click="secede"><i class="el-icon-switch-button"></i>退出</el-menu-item>
      </el-menu>
    </el-header>
    <el-container>
      <!-- 左侧边栏区域 -->
      <el-aside width="200px">
        <div class="user-box">
          <img :src="userInfo.user_pic || this.defaultImg" alt="" />
          <span>欢迎 {{ userInfo.nickname || userInfo.username }}</span>
        </div>
        <!-- 组件库会对 boolean 值的属性进行优化，直接写属性表示将其设置为 true -->
        <el-menu :default-active="$route.path" class="el-menu-vertical-demo" background-color="#23262E" text-color="#fff" active-text-color="#409EFF" unique-opened router>
          <!--
            el-submenu 可以拥有子菜单的菜单项
            el-menu-item 无法拥有子菜单的菜单项
           -->
          <!--
             index 菜单项的唯一标识（不可重复）
             disabled 禁用
            -->
          <template v-for="(item,index) in menus">
            <el-submenu v-if="item.children" :index="item.indexPath" :key="item.indexPath">
              <template slot="title">
                <i :class="item.icon"></i>
                <span>{{item.title}}</span>
              </template>
              <el-menu-item v-for="child in item.children" :key="child.indexPath" :index="child.indexPath">
                <i :class="child.icon"></i>
                {{child.title}}
              </el-menu-item>
            </el-submenu>
            <el-menu-item v-else :index="item.indexPath" :key="index">
              <i :class="item.icon"></i>
              <span slot="title">{{item.title}}</span>
            </el-menu-item>
          </template>

        </el-menu>
      </el-aside>
      <el-container>
        <!-- 页面主体区域 -->
        <el-main>
          <router-view></router-view>
        </el-main>
        <!-- 底部 footer 区域 -->
        <el-footer>© www.itheima.com - 黑马程序员</el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
import { mapState } from 'vuex'
import defaultImg from '@/assets/logo.png'
export default {
  name: 'MainIndex',
  data () {
    return {
      defaultImg,
      menus: []
    }
  },
  methods: {
    secede () {
      // 1、提示用户是否退出
      this.$confirm('确定要退出吗？', '提示', { type: 'warning' }).then(() => {
        // 2、清空 token
        this.$store.commit('user/updateToken', '')
        // 清空用户信息
        this.$store.commit('user/updateUserInfo', {})
        this.$message.success('退出成功')
        // 3、跳转到 login
        this.$router.push('/login')
      }).catch(() => { })
    },
    async getMenus () {
      const { data: res } = await this.$http.get('/my/menus')
      this.menus = res.data
    }
  },
  async created () {
    await this.getMenus()
    this.$store.dispatch('user/getUserInfo')
  },
  computed: {
    ...mapState('user', ['userInfo'])
  }
}
</script>

<style lang="less" scoped>
.main-container {
  height: 100%;

  .el-header,
  .el-aside {
    background-color: #23262e;
  }

  .el-header {
    padding: 0;
    display: flex;
    justify-content: space-between;
  }

  .el-main {
    overflow-y: scroll;
    height: 0;
    background-color: #f2f2f2;
  }

  .el-footer {
    background-color: #eee;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
}

.avatar {
  border-radius: 50%;
  width: 35px;
  height: 35px;
  background-color: #fff;
  margin-right: 10px;
  object-fit: cover;
}

// 左侧边栏用户信息区域
.user-box {
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 1px solid #000;
  border-bottom: 1px solid #000;
  user-select: none;

  img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: #fff;
    margin-right: 15px;
    object-fit: cover;
  }

  span {
    color: white;
    font-size: 12px;
  }
}
// 侧边栏菜单的样式
.el-aside {
  .el-submenu,
  .el-menu-item {
    width: 200px;
    user-select: none;
  }
}
</style>
